"Mechanical drawing history." //Ehow//. Google, 17 June 2005. Web. 7 Sep. 2010. <http://www.ehow.com/about_6508910_mechanical-drawing-history.html>.
- "Mechanical or technical drawing have existed since mankind first began to build."
- "Throughout all of history, man has designed and constructed monumental feats of engineering using available technology."
- "The Industrial Revolution (1760-1850) was a period during which many technological advances were developed."
- "Industrial and agricultural advancements in machinery and automated tooling emerged at an incredible rate."
- "In today's technology driven business environment, most mechanical drawing is done by computer."
- "Though many industries may still rely on the occasional hand drawing, computer software is the primary medium used today."
- "Programs which preform mechanical drawing functions include AutoCad, microstation, CorelDraw, Vector works or Adobe Illustrator."
- "The principal benefit of these programs is that an object, once drafted in the program, can be turned and rotated on any axis with the click of a mouse."
- "This allows a single illustration to be viewed from numerous angles."
- "The advent of linear three point perspective improved"